Reagan Mine (Regan Mine group; Baca Float Tungsten Mine), Reagan Camp, Nogales Mining District (Gold Hill Mining District), Santa Cruz County, Arizona, USAi

Regional Level Types
Reagan Mine (Regan Mine group; Baca Float Tungsten Mine)	Mine
Reagan Camp	- not defined -
Nogales Mining District (Gold Hill Mining District)	Mining District
Santa Cruz County	County
Arizona	State
USA	Country

‡Ref.: Hill, J.M. (1910b), Note on the occurrence of tungsten minerals near Calabasas, Arizona, USGS Bull. 430: 164-166.

Schrader, F.C. & J.M. Hill (1915), Mineral deposits of the Santa Rita and Patagonia Mountains, Arizona, USGS Bull. 582: 353-355.

Schrader, F.C. (1917), The geologic distribution and genesis of the metals in the Santa Rita-Patagonia Mountains, Arizona, Economic Geology: 12: 237-269.

Wilson, E.D. (1941), Tungsten deposits of Arizona, Arizona Bureau of Mines Bull. 148: 50.

Dale, V.B., et al (1960), Tungsten deposits of Cochise, Pima, and Santa Cruz Counties, Arizona, U.S. Bureau of Mines Repor of Investigation 5650: 119-120.

Keith, Stanton B. (1975), Arizona Bureau of Mines Bull. 191, Index of Mining Properties in Santa Cruz County Arizona: 61 (Table 4).

Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 363, 423.

U.S. Bureau of Mines field notes, W1.

Arizona Bureau of Mines card file Santa Cruz County.

MRDS database Dep. ID file #10210287, MAS ID #0040230330.

A former surface and underground W mine located in the SW¼ sec. 7 & the NW¼ sec. 18, T.23S., R.14E, on private land. Owned at times, or in part, by the Regan Brothers & Peck (1975); and, Loftus.

Mineralization is a group of 3 lensing quartz fissure veins, comb-structured and banded, with spotty wolframite and minor scheelite, cutting Jurassic quartz monzonite and in a dike swarm of chloritized and locally epidotized lamprophyre. Mineralization appears shallow, local, and pockety.

The veins, beginning on the west are spaced respectively 60 and 30 feet apart, in much altered and weathered quartz monzonite, the veins occur chiefly in the north-south or younger set of fissures. They strike N.25ºW., parallel with the younger dikes, and have a nearly vertical dip. They offset by a throw of a few feet two of the older east-west dikes.

The two outside veins are small and well-banded and contain minor amounts of wolframite. The "tungsten" ore is usually next to the wall rock, and the vein has a central band of comby quartz, showing that the ore minerals were deposited mainly during the early stages of fissure filling. The middle vein ranges from 1 to 2 feet (30 to 60 cm) in width and consists largely of quartz in which occur pockets and stringers of wolframite. The deposition seems to have been repeated, as the banding fgrom the wall inward is quartz (0.2 inch), wolframite (0.3 inch), quartz (o.25 inch), wolframite (0.1 inch), and quartz. The banding is not at all regular, however, wolframite locally filling the entire space inside the first quartz bands. Scheelite occurs as minute crystals in the quartz near the bands of wolframite.

Workings include pit and open cut operations, plus a 30 foot shaft. Wolframite was discovered in 1906 and the deposit was worked sporadically in the early 1900's and late 1930's. Estimated production would be about 1,500 pounds of 50% WO3 concentrates.

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Link to USGS MRDS:	10210287

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